US9182569B2ActiveUtilityA1
Lens module

Assignee: SAMSUNG ELECTRO MECHPriority: Sep 25, 2013Filed: Dec 10, 2013Granted: Nov 10, 2015
Est. expirySep 25, 2033(~7.2 yrs left)· nominal 20-yr term from priority
Inventors:Jin Hwa Jung Young Suk Kang
G02B 9/62G02B 13/18
PatentIndex Score
Cited by
References
Claims
Abstract

There is provided a lens module including: a first lens having refractive power and having a shape in which an image-side surface is concave; a second lens having refractive power; a third lens having positive refractive power; a fourth lens having positive refractive power; a fifth lens having negative refractive power; and a sixth lens having refractive power and having a point of inflection formed on an image-side surface thereof.
Claims

exact text as granted — not AI-modified
What is claimed is: 
     
       1. A lens module comprising:
 a first lens having refractive power and having a shape in which an image-side surface is concave; 
 a second lens having refractive power; 
 a third lens having positive refractive power; 
 a fourth lens having positive refractive power and a concave object-side surface; 
 a fifth lens having negative refractive power; and 
 a sixth lens having refractive power and having a point of inflection formed on an image-side surface thereof. 
 
     
     
       2. The lens module of  claim 1 , wherein the first lens has a shape in which an object-side surface thereof is convex. 
     
     
       3. The lens module of  claim 1 , wherein the second lens has a shape in which an object-side surface thereof is convex. 
     
     
       4. The lens module of  claim 1 , wherein the fifth lens has a shape in which an image-side surface thereof is convex. 
     
     
       5. The lens module of  claim 1 , wherein the sixth lens has negative refractive power. 
     
     
       6. The lens module of  claim 1 , wherein at least one of the first to sixth lenses is formed of plastic. 
     
     
       7. The lens module of  claim 1 , wherein at least one of an object-side surface and an image-side surface of at least one of the first to sixth lenses is an aspherical surface. 
     
     
       8. The lens module of  claim 1 , wherein an optical system including the first to sixth lenses satisfies the following Conditional Equation 1:
     TTL/f&lt; 1.3  [Conditional Equation 1]
 
 where TTL indicates a distance [mm] from an object-side surface of the first lens to an image surface, and f indicates a focal length [mm] of the overall optical system. 
 
     
     
       9. The lens module of  claim 1 , wherein an optical system including the first to sixth lenses satisfies the following Conditional Equation 2:
   | V 2− V 3|&lt;33  [Conditional Equation 2]
 
 where V2 indicates the Abbe number of the second lens, and V3 indicates the Abbe number of the third lens. 
 
     
     
       10. The lens module of  claim 1 , wherein an optical system including the first to sixth lenses satisfies the following Conditional Equation 3:
   | Nd 4− Nd 5|&lt;0.1  [Conditional Equation 3]
 
 where Nd4 indicates a refractive index of the fourth lens, and Nd5 indicates a refractive index of the fifth lens. 
 
     
     
       11. The lens module of  claim 1 , wherein an optical system including the first to sixth lenses satisfies the following Conditional Equation 4:
   | f 3/ f|&lt; 60  [Conditional Equation 4]
 
 where f3 indicates a focal length [mm] of the third lens, and f indicates a focal length [mm] of the overall optical system. 
 
     
     
       12. The lens module of  claim 1 , wherein an optical system including the first to sixth lenses satisfies the following Conditional Equation 5:
   | r 9/ f 5|&lt;0.2  [Conditional Equation 5]
 
 where r9 indicates a radius of curvature [mm] of an object-side surface of the fifth lens, and f5 indicates a focal length [mm] of the fifth lens. 
 
     
     
       13. The lens module of  claim 1 , wherein an optical system including the first to sixth lenses satisfies the following Conditional Equation 6:
   |( r 5+ r 6)/( r 5− r 6)|&lt;16  [Conditional Equation 6]
 
 where r5 indicates a radius of curvature [mm] of an object-side surface of the third lens, and r6 indicates a radius of curvature [mm] of an image-side surface of the third lens. 
 
     
     
       14. The lens module of  claim 1 , wherein an optical system including the first to sixth lenses satisfies the following Conditional Equation 7:
   | r 3/ f 2|&lt;2.6  [Conditional Equation 7]
 
 where r3 indicates a radius of curvature [mm] of an object-side surface of the second lens, and f2 indicates a focal length [mm] of the second lens. 
 
     
     
       15. The lens module of  claim 1 , wherein an optical system including the first to sixth lenses satisfies the following Conditional Equation 8:
     f 3/ f 4&gt;3.0  [Conditional Equation 8]
 
 where f3 indicates a focal length [mm] of the third lens, and f4 indicates a focal length [mm] of the fourth lens. 
 
     
     
       16. The lens module of  claim 1 , wherein an optical system including the first to sixth lenses satisfies the following Conditional Equation 9:
     V 6− V 5&gt;30  [Conditional Equation 9]
 
 where V5 indicates the Abbe number of the fifth lens, and V6 indicates the Abbe number of the sixth lens. 
 
     
     
       17. A lens module comprising:
 a first lens having positive refractive power and having a shape in which an image-side surface is concave; 
 a second lens having refractive power and having a shape in which an object-side surface is convex; 
 a third lens having positive refractive power; 
 a fourth lens having positive refractive power and a concave object-side surface; 
 a fifth lens having negative refractive power; and 
 a sixth lens having refractive power and having a point of inflection formed on an image-side surface thereof. 
 
     
     
       18. The lens module of  claim 17 , wherein the first lens has a shape in which an object-side surface thereof is convex. 
     
     
       19. The lens module of  claim 17 , wherein the second lens has negative refractive power. 
     
     
       20. The lens module of  claim 17 , wherein the second lens has a shape in which an image-side surface thereof is concave. 
     
     
       21. The lens module of  claim 17 , wherein the fifth lens has a shape in which an image-side surface thereof is convex. 
     
     
       22. The lens module of  claim 17 , wherein the sixth lens has negative refractive power. 
     
     
       23. The lens module of  claim 17 , wherein at least one of the first to sixth lenses is formed of plastic. 
     
     
       24. The lens module of  claim 17 , wherein at least one of an object-side surface and an image-side surface of at least one of the first to sixth lenses is an aspherical surface. 
     
     
       25. The lens module of  claim 17 , wherein an optical system including the first to sixth lenses satisfies the following Conditional Equation 1:
     TTL/f&lt; 1.3  [Conditional Equation 1]
 
 where TTL indicates a distance [mm] from an object-side surface of the first lens to an image surface, and f indicates a focal length [mm] of the overall optical system. 
 
     
     
       26. The lens module of  claim 17 , wherein an optical system including the first to sixth lenses satisfies the following Conditional Equation 2:
   | V 2− V 3|&lt;33  [Conditional Equation 2]
 
 where V2 indicates the Abbe number of the second lens, and V3 indicates the Abbe number of the third lens. 
 
     
     
       27. The lens module of  claim 17 , wherein an optical system including the first to sixth lenses satisfies the following Conditional Equation 3:
   | Nd 4− Nd 5|&lt;0.1  [Conditional Equation 3]
 
 where Nd4 indicates a refractive index of the fourth lens, and Nd5 indicates a refractive index of the fifth lens. 
 
     
     
       28. The lens module of  claim 17 , wherein an optical system including the first to sixth lenses satisfies the following Conditional Equation 4:
   | f 3/ f|&lt; 60  [Conditional Equation 4]
 
 where f3 indicates a focal length [mm] of the third lens, and f indicates a focal length [mm] of the overall optical system. 
 
     
     
       29. The lens module of  claim 17 , wherein an optical system including the first to sixth lenses satisfies the following Conditional Equation 5:
   | r 9/ f 5|&lt;0.2  [Conditional Equation 5]
 
 where r9 indicates a radius of curvature [mm] of an object-side surface of the fifth lens, and f5 indicates a focal length [mm] of the fifth lens. 
 
     
     
       30. The lens module of  claim 17 , wherein an optical system including the first to sixth lenses satisfies the following Conditional Equation 6:
   |( r 5+ r 6)/( r 5− r 6)|&lt;16  [Conditional Equation 6]
 
 where r5 indicates a radius of curvature [mm] of an object-side surface of the third lens, and r6 indicates a radius of curvature [mm] of an image-side surface of the third lens. 
 
     
     
       31. The lens module of  claim 17 , wherein an optical system including the first to sixth lenses satisfies the following Conditional Equation 7:
   | r 3/ f 2|&lt;2.6  [Conditional Equation 7]
 
 where r3 indicates a radius of curvature [mm] of an object-side surface of the second lens, and f2 indicates a focal length [mm] of the second lens. 
 
     
     
       32. The lens module of  claim 17 , wherein an optical system including the first to sixth lenses satisfies the following Conditional Equation 8:
     f 3/ f 4&gt;3.0  [Conditional Equation 8]
 
 where f3 indicates a focal length [mm] of the third lens, and f4 indicates a focal length [mm] of the fourth lens. 
 
     
     
       33. The lens module of  claim 17 , wherein an optical system including the first to sixth lenses satisfies the following Conditional Equation 9:
     V 6− V 5&gt;30  [Conditional Equation 9]
 
 where V5 indicates the Abbe number of the fifth lens, and V6 indicates the Abbe number of the sixth lens.
Cited by (0)

No later patents cite this yet.
References (0)

No backward citations on record.